He said he'd hit my dog

I told him my 7 month old puppy peed on my bed and that I was upset at her. He said if she did that in his bed, he would hit her bc how else would she learn. I told him there are other ways, like telling her she's a bad girl when she's doing it. I got so mad bc no one is ever allowed to hit my puppy. He later claimed he was kidding and was sleepy and dozing off. But I don't understand why he'd let me get so mad about it. What do you guys think? I'd never date someone who would hit my innocent puppy even if she had done something bad like  peed on someone's furniture. I don't have kids and I love my dog like if it was one. Tomorrow we were supposed to go on a date too. Do I cancel? I'm upset. Idk if I believe he was kidding.